WO2018193672A1

WO2018193672A1 - Gas generator and method for assembling gas generator

Info

Publication number: WO2018193672A1
Application number: PCT/JP2018/000850
Authority: WO
Inventors: 信一朗浮田; 藪田　幹夫; 健二福本
Original assignee: 株式会社ダイセル
Priority date: 2017-04-21
Filing date: 2018-01-15
Publication date: 2018-10-25
Also published as: JP6835313B2; JP2018177170A

Abstract

In the present invention, a gas generator is provided with: an igniter; a housing accommodating the igniter and having a discharge port connecting the inside of the housing with the outside; and a filling chamber filled with a solid gas-generating agent, the gas-generating agent being placed such that when the igniter is activated, the filled gas-generating agent can combust. The gas generator is also provided, within a prescribed region of the housing including at least the filling chamber, with a pressurized region formed in a prescribed state of airtightness against the outside of the prescribed region and additionally in a state of high pressure. Prior to the igniter being activated, the pressurized region maintains the prescribed state of airtightness, and is demarcated from the outside thereof by means of a sealing member to be split by means of the combustion gas generated by the gas-generating agent when the igniter is activated. The pressurized region is delimited inside the housing by means of region-delimiting members joined via a prescribed intervening member. Due to this configuration, the gas-generating agent placed in the gas generator can be properly protected from moisture without adding to the workload associated with assembling the gas generator.

Description

Gas generator and gas generator assembly method

The present invention relates to a gas generator that generates a combustion gas by burning a gas generating agent by operating an igniter, and an assembling method thereof.

In a gas generator that generates combustion gas by combustion of a gas generating agent, in order to achieve a desired gas generating performance (output performance), the gas generating agent filled in the gas generator is in a dry state as expected. It is required to fit. Therefore, conventionally, moisture-proof members such as O-rings and gaskets are used for moisture-proofing the gas generating agent disposed in the gas generator. For example, in the gas generator shown in Patent Document 1, a housing of a gas generator is configured by an outer cylinder having both ends opened, and a closing member and a lid member that cover both open ends of the outer cylinder. In the gas generator, the closing member and the lid member are fitted into both openings of the outer cylinder through a seal ring such as an O-ring, thereby maintaining the airtightness in the housing filled with the gas generating agent. It is done.

Also, as another method for preventing moisture from the gas generating agent, a technique for applying a sealing agent on the housing of the gas generator is employed. For example, Patent Document 2 discloses a technique in which a gas generating agent is sealed in a container and the container is hermetically sealed. In the art, the gas generant pack has a cup and a cap constituting the pack formed of an aluminum alloy. And the sealing agent for winding is apply | coated to the cup outer peripheral part of a cap, and the said sealing agent for winding tightens, it becomes packing, and the airtight improvement of the container by a double winding compaction part is achieved.

Japanese Patent Application Laid-Open No. 11-78766 JP-A-3-128744 Japanese Patent Laid-Open No. 10-35402 Japanese Patent No. 4857550

In the conventional moisture-proof technology, a member that is separate from the housing of the gas generator for moisture prevention, for example, a moisture-proof member such as the O-ring, gasket, and coating sealant is interposed in the housing of the gas generator. Further, moisture prevention of the gas generating agent filled in the housing is achieved. Such a moisture-proof member is generally incorporated into a housing in a state of being elastically deformed at the time of assembling the gas generator, so that the airtight state of the inside can be maintained. However, the performance of such a moisture-proof member gradually decreases with age, and practically, it is not easy to maintain an airtight state at the molecular level, and the airtightness in the gas generator decreases with time. There is a possibility of going.

In addition, since the conventional moisture-proof member uses the moisture-proof member different from the housing, the load of quality control of the moisture-proof member increases, and depending on the shape and number of moisture-proof members used, the assembly process of the gas generator As a result, there is a possibility that the number of processes increases, resulting in an increase in assembly load.

In view of the above-described problems, an object of the present invention is to provide a technique for suitably preventing moisture of a gas generating agent disposed in a gas generator while suppressing an assembly load of the gas generator.

In order to solve the above-mentioned problem, the present invention is configured so that the region filled with the gas generating agent inside the housing is in a predetermined airtight state with respect to the outside and is in a state of higher pressure than the outside. A structure for defining a pressurizing region in the housing was adopted. With such a configuration, it is possible to prevent outside air including moisture from entering the area filled with the gas generating agent from the outside while using the conventional sealing means without requiring a separate member from the housing. It can be effectively suppressed.

Specifically, the present invention relates to an igniter, a housing for housing the igniter, a housing having a discharge port connecting the inside and the outside of the housing, and a filling chamber filled with a solid gas generating agent. A gas generator comprising: a filling chamber in which the gas generating agent is disposed at a position where the gas generating agent filled in the housing can be combusted by the operation of the igniter. The gas generator is surrounded by a plurality of region defining members so that a predetermined airtight state with respect to the outside of the predetermined region is formed in a predetermined region in the housing including at least the filling chamber. In addition, a pressurization region in which a high pressure state higher than the pressure outside the predetermined region is formed is further provided. The plurality of region defining members include seal members that maintain the predetermined airtight state before operation of the igniter and are cleaved by combustion gas from the gas generating agent generated by operation of the igniter. The at least one region defining member included in the plurality of region defining members and the other region defining member are not joined by welding and are arranged between the two region defining members in a state where an external force is applied. It joins via the interposed member.

The gas generator according to the present invention employs a configuration in which the gas generating agent is filled in the filling chamber in the housing. The gas generating agent filled in the filling chamber may be directly combusted by the combustion product generated by the operation of the igniter, or through the combustion of a transfer agent or the like different from the filled gas generating agent. May be burned. The igniter of the present invention may be configured to include an igniter body and an igniter collar, or may be only the igniter body. In order to protect the gas generating agent filled in the filling chamber in the housing from moisture from the outside, the pressurizing region is formed so that a predetermined airtight state is formed in a predetermined region including the filling chamber. Is formed. Here, although the said pressurization area | region is an area | region (space) demarcated by being enclosed by the several area demarcating member, about the joining of the area delimiter members, it joins by welding in at least 1 joining site | part. Instead, a joining form in which the predetermined interposing member is interposed is employed. As described above, in the joining form using a predetermined interposition member, it is possible to enjoy advantages such as a small assembly load required for joining as in welding and avoiding the influence of heat generated by welding. In addition, the possibility of gas communication at the molecular level remains, and it is expected that the degree of hermeticity will be smaller than that of the welded joint form. In consideration of this point, a predetermined airtight state is formed in the pressurization region formed by adopting the joining form in which the predetermined interposition member is interposed. The predetermined airtight state is the degree of airtightness with respect to the outside of the predetermined region, which is suitable for moisture-proofing of the filled gas generant formed at the time of manufacturing the gas generator. In other words, the airtight state in a predetermined region where the gas generating agent can be protected from external moisture is ensured so as to ensure the combustion characteristics of the gas generating agent required for the gas generator at the time of manufacture. Airtight.

The pressure region is further pressurized so as to be in a high pressure state higher than the external pressure. As a result, due to the pressure difference between the inside and the outside of the pressurizing region, it is possible to effectively prevent outside air from entering the inside with moisture from the outside of the pressurizing region. In addition, since the gas generating agent is placed in a high-pressure atmosphere by forming the pressurization region, the ignition and combustion speed can be increased, and the combustion start characteristic of the gas generating agent can be made advantageous. . The high pressure state in the pressurizing region may be formed by sealing a predetermined inert gas such as argon or helium. Since such an inert gas does not affect the combustion of the gas generating agent in the filling chamber included in the pressurized region, unexpected combustion of the gas generating agent due to the high pressure state is sufficiently suppressed. Nitrogen and the like are also less likely to affect the combustion of the gas generating agent and can be suitably used for forming a high pressure state. Regarding the inert gas or the like for forming a high pressure state in the pressurized region, the amount of the inert gas is sufficiently higher than the combustion gas generated from the gas generating agent to the extent necessary for moisture prevention in the pressurized region. It may be less.

In the pressurizing region, a predetermined airtight state with respect to the outside is maintained by the seal member corresponding to one of the region defining members before the igniter is operated, that is, until the gas generating agent is burned. The Moreover, the said sealing member is comprised so that it may be cleaved with the combustion gas which arises when an igniter act | operates and a gas generating agent burns. Therefore, the predetermined airtight state maintained by the seal member until the operation of the igniter is canceled by the operation of the igniter, and the combustion gas from the gas generating agent is removed from the pressurized region at the position of the cleaved seal member. It leaks to the outside and passes through the outlet of the housing and is discharged to the outside of the gas generator.

In the gas generator configured as described above, until the igniter is operated, the high pressure state in the pressurization region maintained by the seal member and the predetermined interposed member causes the filling chamber in the pressurization region to enter the filling chamber. It is possible to prevent the outside air with moisture from entering from the outside. Even if the gas in the pressurized region (the inert gas or the like) can leak to the outside, the leakage degree is suppressed by the predetermined interposed member, so that a predetermined airtight state can be maintained, Therefore, the moisture-proof performance in the gas generator can be maintained over a relatively long period. Further, the gas generator does not require an additional moisture-proof member such as an O-ring in addition to the predetermined interposed member in order to improve its moisture-proof performance, and therefore further incorporates a quality control process for the moisture-proof member and a moisture-proof member. There is no need to go through a process, and an increase in the assembly load of the gas generator can be avoided. That is, as the moisture-proof member, a more effective moisture-proof effect can be enjoyed only by a moisture-proof structure with a joining form using a predetermined interposed member.

Here, in the gas generator, the plurality of region defining members include the housing and the igniter, the seal member is joined to the housing side by welding, and the igniter is The predetermined interposed member that is elastically deformable or plastically deformable may be interposed between the housing and the housing, and may be fixed to the housing. Since the region defining members are melted and joined in welding, as a result, in the pressurization region, the airtightness on the side where the igniter is disposed is not as high as the airtightness on the side where the seal member is disposed. Absent. However, as described above, since the inside of the pressurization region is placed in a high pressure state, it is possible to suppress the entry of outside air accompanied by moisture from the outside, and on the side where the igniter is disposed, Even if leaked to the outside, the side where the sealing member is disposed has sufficiently high airtightness, so the degree of leakage is moderate, so that the predetermined airtight state in the pressurizing region is sufficiently Can be maintained for a long time.

As another method, in the gas generator, the filling chamber is formed by at least two membrane members corresponding to the sealing member that can be cleaved even by a combustion product generated by the operation of the igniter. A sealing agent, which is the predetermined intervening member, is applied between the at least two membrane members and is disposed between the at least two membrane members, and the internal space of the filling vessel is pressurized The filling container may be disposed in the housing in a state of being a region and being formed in the high pressure state. In such a configuration, a housing or an igniter different from the above-described form does not contribute to the definition of the pressurization region. Therefore, by adopting this configuration, the assembly process of the gas generator body including the housing and the process of filling the gas generating agent and forming the pressurized region can be realized separately. As a result, the filling of the gas generating agent and the formation of the pressurized region can be realized efficiently, and the assembly load of the gas generator can be reduced.

Here, in the gas generator up to the above, the housing is formed in a cylindrical shape, the discharge port is disposed on one end side of the housing, and the igniter is connected to the discharge port. You may arrange | position on the other edge part side of the said housing on both sides of a filling chamber. Therefore, in the gas generator of such a form, the igniter, the filling chamber, and the discharge port are arranged along the longitudinal direction of the cylindrical housing, and the igniter and the filling chamber are arranged in the internal space of the housing. The area | region of the side to include is made into the said pressurization area | region. The term “end side” includes not only the end surface of the cylindrical housing but also the portion of the housing wall surface in the vicinity of the end surface.

In the gas generator described above, only the filling chamber may be the pressurizing region. According to such a structure, the area | region where a high pressure state is formed can be made as small as possible, Therefore The assembly load of a gas generator can be made small. The housing may include a region other than the pressurization region, that is, a non-pressurization region that is not pressurized to a high pressure state. When the non-pressurized region is included in the housing, the discharge port provided in the housing may be connected to the non-pressurized region. On the other hand, when only the pressurizing region is included in the housing, the above-described sealing member is arranged so as to close the discharge port provided in the housing.

Here, the present invention can be grasped from the aspect of the assembly method of the gas generator. That is, the present invention includes an igniter and a housing that houses the igniter and has a discharge port that connects the inside and the outside of the housing, and is generated by the operation of the igniter in the housing. A method of assembling a gas generator for burning a gas generating agent by a combustion product, wherein the housing is a predetermined region including at least a filling region filled with the gas generating agent, and the predetermined region The inside of the housing has a sealing region divided by a seal member that is cleaved by the combustion gas from the gas generating agent generated by the operation of the igniter. The assembly method includes a preparation step of preparing the igniter, the housing, and the gas generating agent in an assembly chamber in which a predetermined high pressure state higher than atmospheric pressure is formed, and the high pressure A filling step of filling the gas generating agent in the filling region of the housing in the assembly chamber maintained in a state; and the filling region in the housing in the assembly chamber maintained in the high pressure state. The gas generating agent filled in is combusted by the operation of the igniter, the igniter is attached to the housing at a position on the sealing region side, and a predetermined airtightness is set in the sealing region. Mounting steps to form a state. The assembly method makes it possible to assemble a gas generator having the above-described pressurizing region in the housing, thereby effectively reducing the moisture content of the gas generating agent in the housing of the gas generator while reducing the assembly load. Can be realized.

Alternatively, in the assembling method, the gas generating agent and at least two film-like materials that can be cleaved by the combustion product are provided in an assembling chamber in which a predetermined high pressure state higher than atmospheric pressure is formed. A preparatory step of preparing a filling container formed by a sealing member, wherein the filling container is a filling region in which the internal space is filled with the gas generating agent, and the high pressure state is maintained In the assembled chamber, the filling step of filling the gas generating agent in the filling container, and the assembly chamber maintained in the high pressure state, after the filling step, the at least two film-like A sealing step of sealing the filling container by applying a sealant between the sealing members to form a predetermined airtight state inside the filling container; and the predetermined airtight state A step of taking out the formed filling container out of the assembly chamber, and a position where the filling container is accommodated in the housing outside the assembly chamber, and then the filling container can be cleaved by the operation of the igniter. And attaching the igniter to the housing. According to the assembling method, the above-described pressurization region can be formed separately from the assembly of the main body of the gas generator, that is, the filling step and the sealing step are performed in the assembly chamber, and the mounting step is assembled. Since it is performed outside the chamber, the assembly on the main body side of the gas generator can be performed in an atmosphere that is not in a high pressure state, thereby reducing the assembly load of the gas generator. Thereby, effective moisture prevention of the gas generating agent in the housing of a gas generator is realizable, reducing an assembly load.

According to the present invention, the gas generating agent disposed in the gas generator can be suitably moisture-proof while suppressing the assembly load of the gas generator.

It is a 1st figure which shows schematic structure of the gas generator of this invention. It is a figure which shows the flow of an assembly of the gas generator shown in FIG. It is a flowchart regarding the assembly method of the gas generator shown in FIG. It is a 2nd figure which shows schematic structure of the gas generator of this invention. It is a 3rd figure which shows schematic structure of the gas generator of this invention. It is a 4th figure which shows schematic structure of the gas generator of this invention. It is a flowchart regarding the assembly method of the gas generator shown in FIG.

Hereinafter, a gas generator and an assembling method thereof according to an embodiment of the present invention will be described with reference to the drawings. In addition, the structure of the following embodiment is an illustration and this invention is not limited to the structure of these embodiment.

<Example 1>
FIG. 1 is a cross-sectional view of the gas generator 1 in the axial direction. An igniter 16 is attached to one end side (left side in the drawing) of the cylindrical housing 10. The igniter 16 has a known electric igniter main body 16a fixed to a metal igniter collar, and an ignition part including an igniting agent projects from the igniter collar toward the inside of the housing 10. Has been. Accordingly, the combustion product of the igniter generated by the operation of the igniter 16 is released into the housing 10. The igniter 16 is fixed by caulking the igniter collar with respect to the housing 10 by the caulking portion 18. At this time, the caulking fixing by the caulking portion 18 is realized between the igniter collar of the igniter 16 and the housing 10 with the resin O-ring 17 interposed. Thereby, a certain amount of airtightness is formed between the igniter 16 and the housing 10.

On the other hand, the diffuser 12 is attached to the other end side (right side in the drawing) of the housing 10 and is integrated with the housing 10. The diffuser 12 has a substantially cup shape having a peripheral wall portion 12 b and a bottom portion 12 c, and a flange portion 12 a extending in the radial direction is provided at an edge of the peripheral wall portion 12 b extending along the longitudinal direction of the housing 10. Yes. An end portion of the flange portion 12 a is fixed to the housing 10 by welding. The weld site is referred to by reference numeral 11. In a state where the flange portion 12a is fixed to the housing by welding, the peripheral wall portion 12b is positioned so as to protrude outward from the internal space of the housing 10, and a plurality of gas discharge ports 15 are formed in the peripheral wall portion 12b. Has been. The gas discharge port 15 is a through hole that communicates the inside and the outside of the diffuser 12 (that is, the outside of the gas generator 1). The housing 10 and the diffuser 12 may be formed as an integral member.

Further, the cup-shaped member 40 is disposed so as to be located inside the housing 10 and connected to the end face of the flange portion 12a of the diffuser 12. The cup-shaped member 40 is a cup-shaped member having a bottom surface 40a and a peripheral wall portion 40b extending along the longitudinal direction of the housing 10, and a plurality of communication holes 40c are formed in the peripheral wall portion 40b. The communication hole 40 c is a hole that communicates the inside and the outside of the cup-shaped member 40 (that is, the internal space of the housing 10). Further, a projection 40 d is formed at the center of the bottom surface 40 a of the cup-shaped member 40 so as to extend toward the igniter 16.

Here, the cup-shaped member 40 is fixed to the flange portion 12a of the diffuser 12 by welding. In a state where the cup-shaped member 40 is fixed to the diffuser 12 by welding, the internal space of the diffuser 12 (the concave shape space of the cup-shaped portion) and the internal space of the cup-shaped member 40 (the concave shape space of the cup-shaped portion) are connected. Although it will be in a state, the opening part of the cup-shaped member 40 is obstruct | occluded with the sealing tape 45 made from aluminum so that both internal space may be interrupted | blocked. The outer diameter of the cup-shaped member 40 is smaller than the inner diameter of the housing 10. For this reason, a gap 36 exists between the peripheral wall portion 40 b and the inner wall surface of the housing 10, and a dead end gap 36 is formed at the flange portion 12 a of the diffuser 12. This gap 36 functions to retain mist in the combustion gas by continuing with a cylindrical gap 35 formed between the inner cylinder 30 and the housing 10 described later.

Here, the first perforated plate member 22 is disposed on the igniter 16 side of the housing 10 at a distance from the igniter 16. The first porous plate member 22 is formed by a plate-like member having a circular peripheral edge, and the peripheral edge is pressed against the inner wall surface of the housing 10 to be fixed to the housing 10. The first perforated plate member 22 is provided with a plurality of through holes 22a penetrating the front and back surfaces. A space surrounded by the igniter 16, the housing 10, and the first perforated plate member 22 becomes a transfer charge filling chamber 20, which is filled with transfer charge 21. In addition, the explosive charge 21 is hold | maintained in the state pressed against the igniter 16 side by the 1st perforated plate member 22, and is contacting the ignition part of the igniter main body 16a. Moreover, since the through hole 22 a of the first perforated plate member 22 is an opening smaller than the charge transfer agent 21, there is no possibility that the transfer charge 21 leaks from the transfer charge filling chamber 20. The through hole 22a may be closed with a predetermined seal tape.

As the charge transfer agent 21, a gas generating agent having good ignitability and sustained combustion (high combustion temperature) can be used. The combustion temperature of the charge transfer agent 21 is desirably in the range of 1700 to 3000 ° C. As such a transfer agent, for example, a disc-shaped one made of nitroguanidine (34% by weight) and strontium nitrate (56% by weight) having an outer diameter of 1.5 mm and a thickness of 1.5 mm can be used.

Next, a filling form of the gas generating agent 26 in the housing 10 will be described. In the housing 10, an inner cylinder 30 is further disposed between the first perforated plate member 22 and the cup-shaped member 40. The inner cylinder 30 has a peripheral wall portion along the longitudinal direction of the housing 10, and the outer diameter of the peripheral wall portion is smaller than the inner diameter of the housing 10. Therefore, a cylindrical gap 35 having a uniform width is formed between the inner cylinder 30 and the housing 10. Further, the inner cylinder 30 is formed with a plurality of gas passage holes 37 in the circumferential wall portion thereof at substantially equal intervals in the longitudinal direction of the housing 10 and also at substantially equal intervals in the circumferential direction of the circumferential wall portion of the inner cylinder 30. Has been. The gas passage hole 37 is a through hole that communicates the filling chamber 25 that is the internal space of the inner cylinder 30 and the cylindrical gap 35. As will be described later, the gas passage hole 37 is provided so that the combustion gas generated by the combustion of the gas generating agent 26 filled in the filling chamber 25 smoothly flows to the diffuser 12 side. Therefore, the gas passage hole 37 may be formed closer to the diffuser 12 side in the peripheral wall portion of the inner cylinder 30, and the opening area of the gas passage hole 37 may increase as it approaches the diffuser 12 side. .

Here, the inner cylinder 30 has a diameter-increased portion 31 that extends in the radial direction of the housing 10 on the igniter 16 side and is formed in a flange shape. It is in contact with the inner wall surface. The outer diameter of the outer peripheral edge of the enlarged diameter portion 31 is slightly larger than the inner diameter of the housing 10, and when the inner cylinder 30 is disposed in the housing 10, it is expanded due to the elasticity of the peripheral wall portion of the inner cylinder 30. The diameter portion 31 is fixed to the inner wall surface of the housing 10 by being pressed against it. For this reason, no gap is formed in the pressing portion between the enlarged diameter portion 31 and the housing 10. In order to more stably fix the inner cylinder 30, a stepped portion that engages with the outer peripheral edge of the enlarged diameter portion 31 and a projection that engages may be formed on the inner wall of the housing 10.

The inner cylinder 30 has a bottom surface on the diffuser 12 side, and a central hole 32 is formed at the center of the bottom surface. The central hole 32 is formed so as to be able to fit with a protrusion 40 d formed on the bottom surface 40 a of the cup-shaped member 40. Therefore, in the state where the inner cylinder 30 is disposed in the housing 10, the enlarged diameter portion 31 is pressed against the inner wall surface of the housing 10, and the central hole 32 is fitted to the protrusion 40 d of the cup-shaped member 40. By being in the state, the inner cylinder 30 is stably fixed in both the longitudinal direction and the radial direction of the housing, and is disposed coaxially with the housing 10.

The inner space of the inner cylinder 30 functions as a filling chamber 25 that is filled with and holds the gas generating agent 26. Specifically, the second porous plate member 23 is further disposed between the inner cylinder 30 and the first porous plate member 22 in a state where the gas generating agent 26 is filled in the filling chamber 25 of the inner cylinder 30. Has been. Therefore, a space 24 in which a gas generating agent or the like is not disposed is located between the first perforated plate member 22 and the second perforated plate member 23. Similarly to the first porous plate member 22, the second porous plate member 23 is also formed by a plate-like member having a circular peripheral edge, and the peripheral edge is pressed against the inner wall surface of the housing 10. Is fixed. The second perforated plate member 23 is provided with a plurality of through holes 23a penetrating the front and back. A space surrounded by the inner cylinder 30, the housing 10, and the second perforated plate member 23 becomes a filling chamber 25, which is filled with a gas generating agent 26. The gas generating agent 26 is held by the second porous plate member 23 in a state of being pressed toward the inner cylinder 30 side. For this reason, the gas generating agent 26 in the filling chamber 25 is densely filled and is prevented from moving to form a gap. Further, since the through hole 23 a of the second perforated plate member 23 is an opening smaller than the gas generating agent 26, there is no possibility that the gas generating agent 26 leaks from the filling chamber 25. The through hole 23a may be closed with a predetermined seal tape.

As the gas generating agent 26, a gas generating agent having a combustion temperature lower than that of the explosive charge 21 is used. The combustion temperature of the gas generating agent 26 is preferably in the range of 1000 to 1700 ° C., for example, an outer diameter composed of guanidine nitrate (41% by weight), basic copper nitrate (49% by weight), a binder and additives. A single-hole cylindrical shape having a diameter of 1.8 mm, an inner diameter of 0.7 mm, and a length of 1.9 mm can be used.

Here, in the gas generator 1, a predetermined region in the housing 10 including the filling chamber 25 filled with the gas generating agent 26 and the transfer charge filling chamber 20 filled with the transfer charge 21, more specifically, the transfer. A predetermined region including the explosive filling chamber 20, the space 24, the filling chamber 25, the cylindrical gap 35, the gap 36, and the internal space of the cup-shaped member 40 is a pressurized area having a relatively high airtightness. That is, the pressurizing region is a region surrounded and defined by the materials of the housing 10, the igniter 16, the diffuser 12, and the seal tape 45. The airtightness of the pressurizing region is realized by caulking and fixing the O-ring 17 between the igniter 16 and the housing 10 and closing of the opening of the cup-shaped member 40 by the seal tape 45. In addition, since the diffuser 12 and the housing 10 are fixed by welding, it is not necessary to substantially consider a decrease in hermeticity caused by the weld fixing portion. On the other hand, the airtightness between the housing 10 and the igniter 16 via the O-ring 17 is not as high as the airtightness due to welding and fixing with the seal tape 45. Moreover, the inside of the said pressurization area | region is filled with inert gas, such as argon and helium, The internal pressure of a pressurization area | region is changed to the exterior (namely, internal space of the diffuser 12, the gas generator 1). A high pressure state is formed which is higher than the external pressure. In the present embodiment, a region formed in the gas generator 1 and not filled with the inert gas and having a pressure lower than that of the pressurization region is referred to as a non-pressurization region. When the pressure in the non-pressurized region is atmospheric pressure (1 atm = about 100 kPa), the pressure in the pressurized region is, for example, 0.2 MPa or more, preferably about 2 MPa.

The inert gas filled to form the high pressure state as described above is held in the pressurization region almost well due to the airtightness in the pressurization region described above. For this reason, it is possible to effectively prevent outside air accompanying moisture from the outside of the pressurization region from entering the pressurization region, particularly the filling chamber 25 filled with the gas generating agent 26 and the like. Thus, the moisture-proof performance of the gas generator 1 can be maintained high. In addition, if the airtightness due to the O-ring 17 or the like decreases with time due to aging or the like of the O-ring 17 or the like, or the physical hermetic performance of the O-ring 17 or the like does not deteriorate over time. Even if the inert gas filled in the pressurized area leaks to the outside due to limitations, etc., the degree of leakage is so small that the inert gas can be held in the pressurized area for a relatively long period of time. It is possible to suppress the entry of outside air accompanied by moisture from the outside, and to maintain the moisture-proof performance of the gas generator 1 high.

Furthermore, by placing the filling chamber filled with the gas generating agent 26 or the like in an atmosphere of a high pressure state, it becomes possible to increase the combustion rate of the gas generating agent or the like. As a result, the combustion start characteristics of the gas generating agent 26 and the like in the gas generator 1 can be made advantageous, and this can speed up the gas release of the gas generator 1 (from igniter operation to gas release). (Reducing the time required).

Here, a method for assembling the gas generator 1 will be described with reference to FIGS. FIG. 2 schematically shows a flow of assembly of the gas generator 1, and FIG. 3 is a flowchart of the assembly method. First, in S101, each part which comprises the gas generator 1 is carried in in the assembly chamber 80 which assembles the gas generator 1, and preparation for an assembly is carried out. Specifically, a unit in which the diffuser 12, the cup-shaped member 40, and the seal tape 45 are attached in advance to the housing 10 is carried into the assembly chamber 80. Furthermore, the inner cylinder 30, the required amount of gas generating agent 26, the second perforated plate member 23, the first perforated plate member 22, the required amount of transfer powder 21, and the igniter 16 to which the O-ring 17 is attached are also assembled chambers. It is carried into 80. The parts are brought into the assembly chamber 80 through an openable / closable door 81.

When all the parts are carried in, the door 81 is closed and the assembly chamber 80 is closed, and then the assembly chamber 80 is filled with an inert gas to form the high pressure state in the chamber (S102). Processing). Specifically, the amount of the inert gas flowing from the tank 82 into the assembly chamber 80 is controlled by controlling the opening degree of the on-off valve 83 of the tank 82 in which the inert gas is stored. Formation is realized. The pressure in the assembly chamber 80 is confirmed using a detection value of a pressure sensor (not shown).

When a high pressure state is formed in the assembly chamber 80, the inner cylinder 30 is inserted into the housing 10 carried into the chamber (processing of S103). At this time, the central hole 32 of the inner cylinder 30 is fitted into the protrusion 40 d of the cup-shaped member 40, and the enlarged diameter portion 31 of the inner cylinder 30 is pressed against the inner wall surface of the housing 10. Thereafter, the gas generating agent 26 is filled in the internal space (filling chamber 25) of the inner cylinder 30 fixed to the housing 10 (processing of S104). When the gas generating agent 26 is filled, the second porous plate member 23 is also inserted into the housing 10 so that the gas generating agent 26 does not move in the housing 10. Is inserted so as to be pressed against the inner cylinder 30 side, and the second porous plate member 23 is fixed to the housing 10.

Next, the first perforated plate member 22 is inserted into the housing 10, and the first perforated plate member 22 is fixed at a position in the housing 10 appropriate for filling the necessary amount of the transfer charge 21. Thereafter, the transfer charge 21 is filled into the housing 10 (processing of S105), and the igniter 16 is further inserted into the housing 10 so as to come into contact with the charged transfer charge 21. Is attached by caulking (processing of S106). In the gas generator 1 configured as described above, the transfer powder 21 is burned by the operation of the igniter 16, and the combustion gas generated by burning the gas generating agent 26 by the combustion is the gas passage hole 37 and the communication hole. It reaches the inside of the cup-shaped member 40 through 40c. Then, the sealing tape 45 is cleaved by the energy of the combustion gas, and the combustion gas is released to the outside from the gas discharge port 15 of the diffuser 12. Therefore, in the fixing position of the first perforated plate member 22, the thermal energy of the transfer charge 21 combusted by the operation of the igniter 16 is propagated to the gas generating agent 26 preferably filled in the filling chamber 25. It can also be said that the igniter 16 is disposed at a position where the gas generating agent 26 can combust.

According to such an assembling method, the gas generator 1 is assembled in the high-pressure atmosphere in the assembly chamber 80, that is, the gas generating agent 26 and the transfer charge 21 are filled in the housing 10, and the igniter for the housing 10. 16 will be attached. As a result, in the assembled gas generator 1, a region with a relatively high airtightness formed therein, that is, the O-ring 17 and the seal tape 45 interposed between the igniter 16 and the housing 10. A predetermined airtight state in which an inert gas is sealed in a high pressure state is formed in the defined pressurized region. After the assembly is completed, the inert gas in the assembly chamber 80 is discharged, the door 81 is opened, and the completed gas generator 1 may be taken out.

The gas generator assembled according to the above assembly method is the gas generator 1 shown in FIG. And since the gas generator 1 has the pressurization area | region formed by sealing the inert gas in the housing 10 as above-mentioned, it is remarkable with respect to the transfer agent 21 and the gas generating agent 26. Moisture-proof performance can be demonstrated. This is an extremely useful effect in order to suitably maintain the gas generation performance (output performance) of the gas generator 1 over a long period of time. Moreover, in order to exhibit such a remarkable effect, an additional moisture-proof member (such as an O-ring or a gasket) or a special moisture-proof member is not required, so that these quality controls and these are appropriately attached to the gas generator 1. No additional assembly steps are required. Therefore, according to the technique of the present embodiment, the gas generating agent 26 and the like can be suitably moisture-proof without unnecessarily increasing the load of the assembly process.

<Modification>
A modification of the gas generator 1 according to the present embodiment will be described with reference to FIG. For the gas generator 1 shown in FIG. 4, the attachment position of the seal tape 450 is different from the attachment position of the seal tape 45 in the gas generator 1 shown in FIG. 1, and other configurations are substantially the same. Detailed description of the same configuration is omitted. In the gas generator 1 shown in FIG. 4, the seal tape 450 is attached to the outside of the peripheral wall portion 12 b so as to close the gas discharge port 15 of the diffuser 12. Alternatively, the seal tape 450 may be attached to the inside of the peripheral wall portion 12b. Therefore, in this case, almost all the area inside the gas generator 1 is set as the pressurized area, and the non-pressurized area is not substantially included. Also in the gas generator 1 of the present modification, the gas generating agent 26 and the like can be suitably moisture-proof without unnecessarily increasing the load of the assembly process, similarly to the gas generator 1 of the first embodiment. I can understand.

<Example 2>
A gas generator 100 according to a second embodiment will be described with reference to FIG. FIG. 5 is a cross-sectional view of the gas generator 100 in the axial direction. In addition, unlike the gas generator 1 of Example 1, the gas generator 100 does not contain a transfer agent, and the gas generating agent 126 is directly combusted by the operation of the igniter 116. A filter 160 for collecting combustion residues of the gas generating agent 126 is disposed in the housing 110 of the gas generator 100. Specifically, an igniter 116 is attached to one end side (left side in the drawing) of the cylindrical housing 110. Similarly to the igniter 16, the igniter 116 has a known electric igniter main body fixed to a metal igniter collar, and an ignition part including an igniter is disposed from the igniter collar to the housing 110. It protrudes toward the inside. Accordingly, the combustion product of the igniter generated by the operation of the igniter 116 is released into the housing 110. It should be noted that the igniter 116 is fixed to the housing 110 by caulking portions 118 whose igniter collars are located at the ends of the housing 110. At this time, the caulking fixing by the caulking portion 118 is realized with the resin O-ring 117 interposed between the igniter collar of the igniter 116 and the housing 110. Thereby, a certain amount of airtightness is formed between the igniter 116 and the housing 110.

Further, an isolation wall 146 is provided at a position in the vicinity of the central portion of the housing 110 facing the ignition part of the igniter 116 so as to divide the internal space of the housing 110 into two in the longitudinal direction. The isolation wall 146 is fixed to the housing 110 by welding, and the welding site is referred to by reference numeral 146a. A through hole 147 that communicates two internal spaces in the divided housing 110 is provided in a substantially central portion of the isolation wall 146. Before the igniter 116 is operated, the through hole 147 is closed with an aluminum seal tape 145 so as to block both internal spaces, and the periphery of the seal tape 145 is fixed to the isolation wall 146 by welding. And the weld site is referenced by reference numeral 145a. In the gas generator 100, a space surrounded by the igniter 116, the housing 110, the isolation wall 146, and the seal tape 145 becomes a filling chamber 125, and the gas generating agent 126 is filled there. In addition, the gas generating agent 126 is filled to such an extent that the gas generating agent 126 cannot move in the filling chamber 125, and therefore, the ignition part of the igniter body and the gas generating agent 126 are in contact with each other. Thus, when the igniter 116 is operated, the gas generating agent 126 is burned by the combustion product, the seal gas 145 is cleaved by the combustion gas generated there, and the combustion gas is divided into the housing 110 divided by the isolation wall 146. Of the internal space of the gas flow into the internal space different from the filling chamber 125 (the filter chamber which is the internal space on the right side in the figure).

The filter chamber is a space defined by the end wall 148 provided at the end of the housing 110 opposite to the side where the igniter 116 is disposed, the isolation wall 146 and the housing 110. It is. A plurality of gas discharge ports 115 are formed in the housing 110 corresponding to the filter chamber. The gas discharge port 115 is a through hole that communicates the inside and the outside of the housing 110 (that is, the outside of the gas generator 1). Therefore, the filter chamber is not required to be airtight like the filling chamber 125. Therefore, the end wall 148 does not need to be fixed to the housing 110 by welding as in the case of the isolation wall 146, and is only fixed to the housing 110 by the caulking portion 148a in this embodiment.

Furthermore, a filter 160 formed in an annular shape and extending in the longitudinal direction of the housing 110 is disposed so as to face the gas discharge port 115. The filter 160 is formed by stacking stainless steel flat knitted wire meshes in the radial direction and compressing them in the radial direction and the axial direction, cooling the combustion gas generated in the filling chamber 125, and collecting the combustion residue. Note that the space of the hollow portion 150 of the filter 160 is connected to the through hole 147, and combustion gas generated by the combustion of the gas generating agent 126 is introduced into the hollow portion 150 of the filter 160 and further passes through the filter 160 to exhaust gas. It will be led to the outlet 115. Further, outside the filter 160, the filter 160 is not deformed by the gas pressure when the igniter 116 is operated, and the gas discharge port 135 is not blocked between the outer peripheral surface of the filter 160 and the inner wall surface of the housing 110. An annular gap 151 is formed.

Here, in the gas generator 100, a predetermined region in the housing 110 including the filling chamber 125 filled with the gas generating agent 126 in the internal space of the housing 110 is a pressurized region having a relatively high airtightness. The The airtightness of the pressurizing region is realized by caulking and fixing by interposing an O-ring 117 between the igniter 116 and the housing 10 and closing of the through hole 147 provided in the isolation wall 146 by the seal tape 145. . In addition, since the space between the isolation wall 146 and the housing 110, and between the seal tape 145 and the isolation wall 146 are fixed by welding, it is necessary to substantially consider the decrease in airtightness caused by the weld fixing location. There is no. Further, as in the first embodiment, the inside of the pressurizing region is filled with an inert gas such as argon or helium, so that the pressure inside the pressurizing region is changed to the outside (that is, the filter 160). A high pressure state is formed, which is higher than the pressure in the filter chamber in which the gas is disposed and the pressure outside the gas generator 100. The filter chamber in which the filter 160 is disposed is a non-pressurized region because the inside and outside of the housing 110 are communicated with each other via the gas discharge port 135.

The inert gas filled to form the high pressure state as described above is held in the pressurization region almost well due to the airtightness in the pressurization region described above. For this reason, it is possible to effectively prevent outside air accompanied by moisture from entering the filling chamber 125 in the pressurization region from the outside of the pressurization region, so that the moisture-proof performance of the gas generator 100 is maintained high. In addition, if the airtightness due to the O-ring 117 etc. decreases with time due to aging deterioration of the O-ring 117 or the like, or the physical airtightness performance of the O-ring 117 etc. does not deteriorate over time. Even if the inert gas filled in the pressurized area leaks to the outside due to limitations, etc., the degree of leakage is so small that the inert gas can be held in the pressurized area for a relatively long period of time. It is possible to suppress the entry of outside air accompanied by moisture from the outside, and to maintain the moisture-proof performance of the gas generator 100 high. Furthermore, the combustion rate of the gas generating agent 126 can be increased by placing the filling chamber 125 filled with the gas generating agent 126 in an atmosphere of high pressure.

Further, the gas generator 100 configured as described above is assembled in the assembly chamber 80 filled with the inert gas shown in FIG. 2 in the same manner as the gas generator 1 of the first embodiment. The pressure region can be formed inside. Therefore, the gas generator 100 also does not require an additional moisture-proof member (such as an O-ring or a gasket) or a special moisture-proof member in order to achieve the above-described suitable moisture-proof performance. As a result, these quality controls and an additional assembly process for properly attaching them to the gas generator are not required, and according to the technique of the present embodiment, without increasing the load of the assembly process unnecessarily, The gas generating agent 126 and the like can be suitably moisture-proof.

<Example 3>
A gas generator 200 according to a third embodiment will be described with reference to FIG. FIG. 6 is a sectional view of the gas generator 200 in the axial direction. Of the components constituting the gas generator 200, components that are substantially the same as those of the gas generator 100 of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the gas generator 200, the internal space of the housing 110 is divided into two spaces by the isolation wall 146, that is, a space on the igniter 116 side and a space on the terminal wall 148 side. In the present embodiment, the isolation wall 146 is not necessarily fixed to the housing 110 by welding. Further, the through hole 147 provided in the isolation wall 146 is not blocked by a seal member such as a seal tape 145 as shown in the gas generator 100 of the second embodiment. Therefore, the internal space itself of the housing 110 is in a state of substantially communicating with the outside.

Here, in the space on the igniter 116 side of the housing 110, a canister 225 which is a filling container formed of an aluminum thin film is disposed. The canister 225 has a peripheral wall portion 225a and a bottom surface portion 225d, and the peripheral wall portion 225a and the bottom surface portion 225d are formed of a single sheet-like aluminum thin film. Furthermore, the top surface portion 225b formed of another sheet-like aluminum thin film is fixed to the end of the peripheral wall portion 225a of the aluminum thin film including the peripheral wall portion 225a and the bottom surface portion 225d. The part to be fixed by tightening is referred to by reference numeral 225c. It should be noted that a known sealing agent is applied between the two aluminum thin films when the winding fastening portion 225c is formed. The sealing agent corresponds to the predetermined interposition member of the present invention, and imparts predetermined airtightness to the canister 225 by curing. In addition, since the two aluminum thin films are fastened and fixed, an external force is applied to the cured sealing agent, which contributes to the formation of a predetermined airtightness. In addition, the airtightness between the aluminum thin films by the hardened sealing agent is not as high as the airtightness by welding and fixing with the seal tape 45 in the first embodiment.

The inner space of the canister 225 is filled with a gas generating agent 226, the top surface portion 225b thereof faces the ignition portion of the igniter 116, and the peripheral wall portion 225a thereof extends in the longitudinal direction of the housing 110. The canister 225 is disposed in the internal space of the housing 110 so that the bottom surface portion 225 d faces the through hole 147. Here, in the gas generator 200, the internal space of the canister 225 is a pressurized region having a relatively high airtightness. The airtightness of the pressurizing region is realized by the winding fastening portion 225c accompanied by application of the sealing agent. The canister 225 is filled with an inert gas such as argon or helium in the same manner as in the first embodiment, so that the internal pressure becomes higher than the pressure outside the canister 225. A state is formed. Note that the interior space of the housing 110 other than the canister 225 is a non-pressurized region because the interior and exterior of the housing 110 are substantially communicated with each other via the gas discharge port 135.

The inert gas filled to form the high pressure state as described above is held in the canister 225 almost satisfactorily by the above airtightness. For this reason, it is possible to effectively prevent outside air accompanied by moisture from entering the canister 225 from the outside of the canister 225, and thus the moisture-proof performance of the gas generator 200 can be maintained high. In addition, if the airtightness due to the tightening fixing portion 225c decreases with time due to its deterioration over time, or due to the limit of its physical airtightness performance, the filled inert gas is Even in the case of leakage, the inert gas can be held in the canister 225 for a relatively long period because the leakage is so small that the entry of outside air with moisture from the outside is suppressed, and gas is generated. The moisture-proof performance of the vessel 200 can be maintained high.

Further, the gas generator 200 configured in this way is assembled according to the assembling method shown in FIG. Specifically, FIG. 7 is a flowchart of the assembling method. First, in S201, when the gas generator 200 is assembled, the components constituting the canister 225, specifically, an aluminum thin film including the peripheral wall portion 225a and the bottom surface portion 225d, and an aluminum thin film including the top surface portion 225b are assembled into the assembly chamber 80. The required amount of gas generating agent 226 to be filled is also carried into the canister 225. When these parts are carried in, the door 81 is closed and the assembly chamber 80 is closed, and then the assembly chamber 80 is filled with an inert gas, thereby forming the high pressure state in the chamber (S202). Processing). The formation of the high pressure state is based on the control of the inflow amount of the inert gas from the tank 82 as in the process of S102.

When a high pressure state is formed in the assembly chamber 80, the gas generating agent 226 is filled in the canister 225 (a recessed space defined by the peripheral wall portion 225a and the bottom surface portion 225d formed by the aluminum thin film). (Processing of S203). When the gas generating agent 226 is filled, the aluminum thin film including the top surface portion 225b is coated with the sealing agent and then fastened to the other aluminum thin film to fix the gas generating agent 226 in the canister 225. Performed (processing of S204). Then, after the applied sealing agent is dried, the canister 225 filled with the gas generating agent 226 is taken out from the assembly chamber 80 (processing of S205).

Next, in the outside of the assembly chamber 80, that is, in an atmosphere where a high pressure state is not formed, a space on the side where the igniter 116 is to be installed in the internal space of the housing 110 (the space on the end wall 148 side) The canister 225 is accommodated in the opposite space (process of S206). Further, the igniter 116 is inserted into the housing 110 and attached to the housing 110 by caulking so that the ignition portion of the igniter 116 faces the top surface portion 225b of the canister 225 (processing of S207). When attaching the igniter 116 to the housing 110, the filter 110 or the end wall 148 may already be attached to the housing 110, or the filter 160 or the like is attached after the igniter 116 is attached to the housing 110. May be. When the igniter 116 is operated in the gas generator 200 configured in this way, the top surface portion 225b is mainly cleaved by the combustion products, and combustion of the gas generating agent 226 in the canister 225 is induced. The combustion gas generated by the combustion of the gas generating agent 226 is released to the outside of the gas generator 200 through the through hole 147 and the filter 160 by cleaving the bottom surface portion 225d.

As described above, the gas generator 200 is filled in the canister 225 with the gas generating agent 226 in the assembly chamber 80, and the canister 225 is accommodated in the housing 110, so that the inert gas is filled and the high pressure is obtained. The pressurized region where the state is formed can be included in the gas generator 200. Therefore, the gas generator 200 does not require an additional moisture-proof member (such as an O-ring or a gasket) or a special moisture-proof member in order to achieve the above-described suitable moisture-proof performance. As a result, these quality controls and an additional assembly process for properly attaching them to the gas generator are not required, and according to the technique of the present embodiment, without increasing the load of the assembly process unnecessarily, The gas generating agent 226 and the like can be suitably moisture-proof. Moreover, since the attachment process of the igniter 116 is performed outside the assembly chamber, the gas generator 200 can be efficiently assembled.

1, 100, 200: Gas generators 10, 110: Housing 12: Diffusers 15, 115: Gas discharge ports 16, 116: Igniters 17, 117: O-rings 18, 118: Caulking section 20: Transfer charge filling chamber 21: Transfer powder 22: 1st porous plate member 22a: Through hole 23: 2nd porous plate member 23a: Through hole 25, 125: Filling

chambers

26, 126, 226: Gas generating agent 30: Inner cylinder 40: Cup-shaped

member

45, 145, 450: Seal tape 80: Assembly chamber 81: Door 82: Tank 83: On-off valve 146: Isolation wall 147: Through hole 160: Filter 225: Canister

Claims

An igniter,
A housing for housing the igniter, the housing having a discharge port connecting the inside and the outside of the housing;
A filling chamber filled with a solid gas generating agent, wherein the gas generating agent is disposed at a position in the housing where the charged gas generating agent can be burned by operation of the igniter;
A gas generator comprising:
By being surrounded by a plurality of region defining members, a predetermined airtight state with respect to the outside of the predetermined region is formed in a predetermined region in the housing including at least the filling chamber, and further, the predetermined region A pressurization region in which a high pressure state higher than the pressure outside the region is formed,
The plurality of region defining members include a seal member that maintains the predetermined airtight state before the igniter is operated and is cleaved by combustion gas from the gas generating agent generated by the operation of the igniter. ,
The at least one region defining member included in the plurality of region defining members and the other region defining member are not joined by welding and are disposed between the two region defining members in a state where an external force is applied. Joined through,
Gas generator.
The plurality of region defining members include the housing and the igniter;
The seal member is joined to the housing side by welding,
The igniter is fixed to the housing with the predetermined interposed member elastically deformable or plastically deformable interposed between the housing and the housing.
The gas generator according to claim 1.
The filling chamber is an internal space of a filling container formed by at least two film members corresponding to the sealing member, which can be cleaved even by a combustion product generated by the operation of the igniter,
Between the at least two membrane members, a sealing agent that is the predetermined intervening member applied to both membrane members is disposed,
The internal space of the filling container is the pressurizing region, and the filling container is disposed in the housing in a state formed in the high pressure state.
The gas generator according to claim 1.
In the pressurization region, the high pressure state is formed by sealing a predetermined inert gas.
The gas generator according to any one of claims 1 to 3.
The housing is formed in a cylindrical shape, and the discharge port is disposed on one end side of the housing,
The igniter is disposed on the other end side of the housing across the filling chamber with respect to the discharge port.
The gas generator according to any one of claims 1 to 4.
Only the filling chamber is the pressurizing region,
The gas generator according to any one of claims 1 to 5.
An igniter and a housing containing the igniter and having a discharge port connecting the inside and the outside of the housing, and generating gas by combustion products generated by operation of the igniter in the housing A method of assembling a gas generator for burning an agent,
The housing is a predetermined region including at least a filling region filled with the gas generating agent, and from the gas generating agent generated by the operation of the igniter with respect to the outside of the predetermined region. A sealing region separated by a sealing member that is cleaved by combustion gas, and having an inside of the housing;
The assembly method is as follows:
Preparing the igniter, the housing, and the gas generating agent in an assembly chamber in which a predetermined high pressure state higher than atmospheric pressure is formed;
A filling step of filling the gas generating agent into the filling region of the housing in the assembly chamber in which the high pressure state is maintained;
In the assembly chamber in which the high pressure state is maintained, the gas generating agent filled in the filling region in the housing can be burned by the operation of the igniter, at a position on the sealing region side, An attachment step of attaching an igniter to the housing to form a predetermined hermetic state in the sealed region;
A method for assembling a gas generator, comprising:
An igniter and a housing containing the igniter and having a discharge port connecting the inside and the outside of the housing, and generating gas by combustion products generated by operation of the igniter in the housing A method of assembling a gas generator for burning an agent,
The assembly method is as follows:
In the assembly chamber in which a predetermined high pressure state higher than atmospheric pressure is formed, the gas generating agent and a filling container formed by at least two film-like sealing members that can be cleaved by the combustion product are prepared. A preparatory step in which the filling container is a filling region whose internal space is filled with the gas generating agent;
A filling step of filling the gas generating agent into the filling container in the assembly chamber in which the high pressure state is maintained;
In the assembly chamber in which the high pressure state is maintained, after the filling step, a sealing agent is applied between the at least two film-like sealing members to seal the filling container. A sealing step for forming a predetermined hermetic state inside,
Taking out the filling container in which the predetermined airtight state is formed out of the assembly chamber;
An attachment step of housing the filling container in the housing outside the assembly chamber, and then attaching the igniter to the housing at a position where the filling container can be cleaved by operation of the igniter;
A method for assembling a gas generator, comprising: